Furnace for manufacturing illuminating-gas



(No ModeL) F. EGNER.

7) FURNACE FOR MANUFACTURING ILLUMINATING GAS.

No. 315,751. Patented Apr 1885.

75 ATTORNEYS.

UNITED STATES PATENT @FHQE.

FREDERIC EGNER, OF ST. LO 1S, MISSOURI.

FURNACE FOR MANUFACTURING lLLUMlNATlNG-GAS.

SPECIFICA'l ON forming part of Letters Patent No. 315,751, dated April 14, 1885.

Application filed Scptrnihcr 9, 1884. (X0 model.)

To all 2.0720721, it may concern.-

Be it known that l, Fannnnro Ecnnn, a citizen of the United States, residing at St. Louis, in the State of Missouri, have invented a certain new and useful Improvement in Furnaces for Manufacturing Illuminating-Gas, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing.

The figure in the drawing represents my improved apparatus for manufacturing illu minatinggas, partly in vertical section.

My invention is an improvement in the class of gas-furnaces whose gas-exit pipe is located but a short distance above an air-inlet, and connected with an exhauster for the purpose of drawing off the gas and also creating a vacuum in the furnace.

My improvement is embodied in the construction and combination of parts, as hereinafter described and claimed.

I will now proceed to describe my invention with reference to the accompanying drawing.

A is the coal-hopper, provided with an airtight lid.

B is a measuring or feeding drum for delivering the coal contained in the hopper A to the furnace in regular quantities.

O is a valve, which, when closed, cuts off all communication between the hopper A and the furnace.

D is a branch pipe, provided with an airtight lid,tl,held in its place by the weighted lever 01. The coal passes through this branch to the furnace E, which is made narrow at the mouth 6, from whence it gradually increases to allow for the expansion and swelling of the coal as it is gradually heated. At that point, e, where gas begins to be given off, the furnace becomes straight, and continues so from c to e", where combustion commences. From e the furnace decreases rapidly in width to 6 where it again becomes stra-ight'for a short space and e is reached. Between and e" the heat is mostintense. Fromethewalls ofthefurnace have a slightly-domed form for strength, and are then continued as a straight cylinder to the bottom, where they join onto an iron cylinder, F, provided with a flange, f, built into the walls of the furnace, which are here carried by brick arches g g.

G is the brick-work or masonry which sup ports the whole weight of the furnace.

H is a tank contained within and supported by the brick-work G, and into which the bottom of cylinder F projects. The tank H is kept filled with water several inches above the bot-tom of the cylinder, to keep the furnace air-tightat this point and quench the heated gas-coke after all the gas is burned out of it. This coke may be removed from the tank H through the arches g g.

I are tuyere-pipes situated between a and e in the furnace. These communicate with an air-chamber, .1", contained within the walls, and are provided with pipes t, forming a com tinuatiou of pipes I, and reaching to the outside of the furnace, through which they may be cleaned out. W'hen the furnaceis working, the holes i are stepped up with plugs The air-chamber J communicates with the air by a pipe, j, provided with a valve, j, for regulating the admission of air, which is heated by contact with walls of the said chamber while passing through it.

Kis a pipe situated at a sufficient distance above the air-inlet and in the straight part c to e of the furnace. This pipe is for the exit of all gas produced within the furnace, and communicates with the hydraulic main L.

Z is a pipe connecting the hydraulic main or seal with an exhauster, O, by which all gas produced is withdrawn from the furnace through the pipe K, and this can be regulated by the valve Z.

M are. air-tight lids at various points on pipe K, for clearing it out. The exhauster O is a bladed fan adapted to rotate on a horizontal axis or shaft, its radial blades projecting into the pipe I, so that the rotation of the fan drives the gas along the same and creates a suction in the furnace-chamber E, and there by produces an indraft of air through the tuyeresl, causing an intense combustion of the fuel at that point, which liberates the gases in the layers of coal above it as they descend from the top of the furnace. In practice that portion of the furnace above the air-inlet i is. twelve feet inheight, and the gas-exit is located one-third the distance above said airinlet, being thus eight feet below the coal-inlet. All the tar-vapors will have to pass through several feet of hot coke, which will gasify them before they are drawn off up the pipe K. The steam and aqueous vapor arising from the hot coke in the Water in the cylinder F will rise and be decomposed into gases while passing through the intensely-heated fuel round the tuyeres I. These gases will be drawn off through the pipe K with the rest, and will increase the product of the furnace by diluting the tar-vapors.

N N are sight-holes in the walls of the furnace, through which the coking of the coal may be observed. These are usually stopped up by the plugs n when the furnace is Working.

Elevators or other mechanism may advantageously be employed for removing the coke from the tank H in regular quantities, so that the working of the furnace may be kept even.

I do not claim, broadly, locating the gasexit pipe above the air-inlet, nor the use of an exhauster for drawing off the gas; but,

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is'

The combination,with a furnace for the man- 25 ufacture ofilluminating-gas, of the tuyerepipes I, air-chamber J, having the air-pipe j and valve j, the exit-pipe K, situated at a suitable distance above said tuyere-pipes, the

hydraulic seal L, and an exhauster for re- 0 moving the manufactured gas from the upper part of the furnace and promoting combustion in the lower part of the furnace by creating an indraft of air substantially as shown and specified.

FREDERIO EGNER.

Witnesses: I

JNO. A. TOMPKINS, TEEODORE AYREi. 

